What is an .RB file?
An .RB file is typically a Ruby Source Code file. Developers use the Ruby programming language to build websites, web applications, and automation scripts. These files contain plain text instructions that the system executes.
Because the .RB extension is common, it has several other distinct uses. Game developers use .RB files as Pokémon game creation scripts within the Pokémon Essentials kit for RPG Maker XP. Additionally, older e-reader devices use .RB for Rocket eBook files formatted for the historical NuvoMedia e-reader. You may also find .RB files used as Real Studio Projects in earlier versions of Xojo.
How to open .RB files?
You can easily open and edit Ruby source code files using standard text editors like Microsoft Visual Studio Code, Notepad++, or Sublime Text. To actually run these scripts, you must install the Ruby Interpreter on your computer.
If your file is an eBook, you will need specific e-reader software that supports legacy formats. If it is a game script, you generally open it directly within the RPG Maker XP software environment.
Identify your .RB file
Since an .RB file could be a developer script, a gaming asset, or an eBook, you might not know how to handle it safely. viewer.online/rb analyzes .RB files to identify their exact format and creator software, shows which programs can open the file, and usually previews it directly in your browser.
File Conversion
Sometimes you need to share code files with non-technical users. You can convert .RB text files to more readable formats like .TXT or .PDF. If you have an old Rocket eBook, you should convert it to a modern format like .EPUB or .MOBI. We recommend using convert.guru to handle these conversions easily and securely.
Summary
viewer.online/rb directly opens and previews .RB files in the browser, eliminating the need to install software or troubleshoot compatibility issues.